Smoke-consuming furnace.



No. 779,176. PATENTED JAN. 3, 1905. 0. E. NB-UMANN.

SMOKE GONSUMING FURNACE.

APPLIOATION FILED NOV. 13, was. 'nnnnwxn NOV. 28. 1904.

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PATENTED JAN. 8, 1905.

0. E. NEUMANN. SMOKE GONSUMING FURNACE.

APPLICATION FILED NOV. 1a, 1903. RENEWED NOV. 2a. 1904.

8 SHEETS-BHEET 2.

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PATENTED JAN. 3, 1905.

0. E. NEUMANN. SMOKE GONSUMING FURNACE.

APPLICATION FILED NOV. 13, 1903. RENEWED NOV. 28. 1904.

8 SHEETS-BKEET 3.

PATENTED JAN. 3, 1905.

O. E. NEUMANN.

SMOKE CONSUMING FURNACE.

APPLICATION FILED NOV. 13, 1903. RENEWED NOV. 23. 1904.

8 SHEETS-SHEET 4 to c WW No. 779,176. PATENTED J N. 3, 1905. 0. E.NBUMANN.

SMOKE GONSUMING FURNACE.

APPLICATION FILED NOV. 13, 1903. RENEWED NOV. 2B. 1904.

8 SHEETS-SHEET 5.

- AAA/cw l FATBNTED MN! 6, 1905' SMOKE GONSUMING FURNAGE. APPLIGATIONrum) NOV. 13, 1903. RENEWED NOV. 26. 1904.

0. B. NBUMANN.

8 SHEETS-SHEET 6.

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0. E. NEUMANN.

I SMOKE GONSUMING FURNACE. APPLICATION FILED NOV. 1a, 1903. RENEWED NOV.2a. 1904.'

B SHEETS-SHEET 7.

/ki1- ATTORNEYS WITNESSES No. 779,176. PATENTED JAN. 3, 1905.

O. E. NEUMANN.

SMOKE GONSUMING FURNACE.

APPLICATION FILED NOV. 13, 1903. RENEWED NOV. 28. 1904.

8 SHEETS-SHEET 8.

UNrrr n STATES Patented. January 3, 1905.

ATENT FFTCE.

OTTO EMIL NEUMANN, OF NEW YORK, N. Y., ASSIGNOB OF ONE-HALF TO THEODOREFRANK, OF BROOKLYN, NEW YORK.

SMOKE-CONSUIVIING FURNACE.

SPECIFICATION forming part of Letters Patent No. 779,176, dated January3, 1905.

Application filed November 13, 1903. Renewed November 28, 1904. SerialNo. 234,545.

To all whom it may concern:

Be it known that I, Or'ro EMIL NEUMANN, a citizen of the Empire ofGermany, residing in New York, in the borough of Brooklyn and State ofNew York, have invented certain new and useful Improvements inSmoke-Consuming Furnaces, of which the followingis a specification.

This invention relates to smoke-consuming furnaces, and has for itsobject to provide means whereby soft or bituminous coal or anthracitecoal may be burned insuch a manner as to consume all the coal particlesin the smoke and whereby the fuel may be automatically fed to the gratein a regular and reliable manner, so as to keep up a uniform supply offuel on the grate.

For this purpose the invention consists of a smoke-consuming furnacecomprising a combustion-chamber, a grate in said combustionchamberprovided with a central opening, a fuel-receptacle, a chute forsupplying fuel to said receptacle, and means for verticallyreciprocating the receptacle for receiving the fuel from the chute,passing the receptacle up to the central opening of the grate, and fordischarging the fuel onto the grate.

The invention consists, further, of an inclined grate, a second gratecontacting therewith and inclined in opposite direction and providedwith a central opening, and sliding gates below said opening for closingthe same.

The invention consists,further, in rotating the grates so as to permitthe convenient cleaning of the same of ashes and clinkers andinproviding the combustion-chamber at its sides and top with doublewalls, respectively, for

heating the feed-water and air and for commingling the latter with theproducts of combustion for insuring a perfect combustion of the same;and the invention consists, lastly, of certain details of constructionand combinations of parts, which will be fully described hereinafter andfinally pointed out in the claims.

In the accompanying drawings, Figure 1 represents a front elevation ofmy improved smoke-consuming furnace. Fig. 2 is a vertical longitudinalsection of the same on line2 2, Fig. 1. Fig. 3 is a vertical transversesection on line 3 3, Fig. 2. Fig. 4 is a horizontal section on line 4 4,Fig. 2, drawn on a smaller scale. Fig. 5 is a horizontal section on line5 5, Fig. 2, also drawn on a smaller scale. Fig. 6 is a vertical centralsection of the fuelreceptacle and actuating means therefor when inposition for being supplied with fuel. Fig. 7 is also a vertical centralsection of the fuelreceptacle and actuating means therefor when inposition for discharging the fuel. Fig. 8 is a vertical longitudinalsection of my improved smoke-consuming furnace shown as applied to awater-tube boiler. Fig. 9 is a horizontal section on line 9 9, Fig. 8;and Fig. 10 is a detail vertical center section through thegrate-supporting rotatable frame of the furnace shown in Fig. 8, drawnon a larger scale.

Similar letters of reference indicate corresponding parts.

Referring to the drawings, A represents a combustion-chamber provided atits side with double walls a and having its top inclined and alsoprovided with double walls I), suitably provided with a layer 0 ofheat-insulating material, so as to prevent loss of heat by radiation.The combustion-chamber A is supported by standards a, to which the grateD is attached, which is-preferably circular in shape and provided with acentral opening. In the central opening of the grate D a second grate E,inclined in opposite direction to the grate D, is arranged. The grate Eis supported by its angular lower end 0, which forms a circular openingon standards F, attached at their lower ends to horizontal braces f. Thebraces f are suitably secured in the side walls of a well W, in which afuel receptacle G and means for vertically reciprocating the same arearranged. The grates D and E may be of circular, square, or other shape,according to the type of boiler withwhichmyimprovedsmoke-consumingfurnace is used. Below the lower grate Esliding gates H are arranged, which are adapted to close the centralopening of the lower grate E, so

as to prevent any fuel from falling into the well. The gates H areprovided at their lower sides with racks it, which are engaged bytoothed segments I, supported by camshaped levers L, pivoted on shaftsZ, journaled in the standards F. The shafts Z support casings Z, inwhich spiral springs Z are ar-- ranged.

The fuel receptacle G is adapted to be vertically reciprocated by meansof pistons P, movable in cylinders P, provided at their lower ends withopenings P adapted to communicate with openings m of valve-casings M,ways m of valves M receiving their motor medium fromv pipes on. When themotor medium passes through the ways on of the supply-valves M throughthe openings m of the valve-casings M, and through the opening P of thecylinder P, the pistons P ascend and move the fuel-receptacle Gupwardly. Near the end of the stroke of the pistons the receptacle Gencounters the cam-shaped levers L, supporting the segments I, whichengage the racks h of the sliding gates H and cause the gates to belaterally moved apart so as to permit the fuel-receptacle G to pass upto the central opening of the lower grate E. When the fuel-receptaclereaches this position, openings n of a cylinder N, attached to thebottom of the receptacle G, are brought in communication with an openingm of the valve-casings M. The motor medium passing through the openings02 into the cylinder N causes the piston N in the cylinder N to be movedupwardly, whereby a platform 0, attached to the upper end of the pistonN, is also moved upwardly, so as to force the fuel in the receptacle Gout of the same and onto the grate E. The fuel resting on the grate E isonly subjected to partial combustion, which causes the smoke produced tocontain considerable quantities of carbon particles. This smoke passesover the burning fuel on the grate D, so that the carbon particles inthe smoke are caused to be almost completely burned. Thepartially-burned fuel on the grate E is, by a charge supplied bythefuel-receptacle G and platform 0, moved over onto the grate D, whereit is subjected to a considerable draft and intense combustion.

To the platform 0 is attached a tube R,

- which passes through an opening g of the receptacle G and in which asecond tube R and a rod R connected at its lower end with the valves M,are adapted to be telescopically folded. The tube R is provided with aslot '1", running the full length of the same, in which lugs r of thesecond tube R move until interposed by an adjustable nut T on theexterior of the tube R. The adjustable interiorly-screw-threaded nut Tengages the exterior screw-threads of the outer tube R. The

second tube R is also provided with a slot 1, running the full length ofthe same, in which lugs r of the interior rod R move until interposed bythe portion of the tube R forming the end of the slot. By thisarrangement the tubes R R and rod R form a telescopic joint, which isextended when the platform 0 is in its highest position and by the pullon the same cause the valves M and casings M to be moved out ofalinement with the opening 19 of the cylinder P, whereby the motormedium in the cylinders P passes out of the same and permits the pistonsP to descend. The openings m of the casing M are of somewhat greaterlength than the openings m, so as to cause the motor medium to exert itspressure on the piston N of the cylinder N for a longer time than on thepistons P, so as to prevent the platform 0 from descending before thefuel-receptacle. In this manner the material is prevented from fallingback into the receptacle. On the descent of the fuel-receptacle G theplatform 0 and the cylinder N are caused to descend, whereby theopenings n of the cylinder N are moved out of alinement with theopenings m of the casings M, and when the openings at are free of thecasings M the motor medium passes out of the cylinder N and permits thepiston N and the platform 0 to descend. However, before the platform 0commences its descending movement the sliding gates H are caused to beclosed by the action of the springs Z in the casings Z. Hereby the fuelis prevented from being returned into the fuel receptacle. When thefuel-receptacle G and cylinder N approach their lowermost positions, thereceptacle is supplied with fuel from a chute C, and lugs N 2 of thecylinder N engage a plate M of the valve-casings M and cause the same tobe moved downwardly, so as to cause the openings m of the valve-casingsM to be brought into communication with the openings P of the cylinderP, and so cause the motor medium to enter the cylinder P, move the piston P and fuel-receptacle G upwardly, and repeat the movements justdescribed. The rods R are screw-threaded at their lower ends andprovided with nuts R which are adjustable, so as to adjust the valves Min the valve-casings M. The nutT is vertically-adjustable on the outertube R, whereby the time of the actuation of the valve-casings M may beregulated.

In Figs. 8, 9, and 10 is shown the application of my improved grate to awater-tube boiler. In this case the outer grate D is supported byinclined bars D of a ring-shaped frame D which is provided with araceway D, movable on balls D of a raceway D in a second ring shapedframe D. The upper ring-shaped frame D also supports a grate E and isprovided with acircumferential gearwheel E which may be rotated from theoutside of the furnace-walls by means of a suitable pinion andtransmission means. To the lower ring-shaped frame D is attached awindchest D supported by the standards F, square "News at its lower endand round at its upper end. The wind-chest is provided with perforationsH and connected with supply-pipes H as shown clearly in Fig. 10. Thewind-chest D. acts as a twyer, the draft-air passing through theperforations H. By the rotation of the grates the grates may be readilycleaned of ashes and clinkers, inasmuch as all sides become accessiblefrom the front and sides of the furnace.

The double wall a of the combustion-chamber A forms a reservoir, towhich feed-water is supplied by means of a pipe 2;, from which it isconducted off by a pipe o. The upper part of the combustion-chamber ispreferably inclined and provided with an opening 5 and a screen Z2through which air passes into the channel formed by the walls 6, whichair is heated and conducted by a channel V and branch channel V, so asto co mmingle with the products of combustion of the furnace and causethe-complete combustion of the remaining parts of carbon in the smokepassing over the bridge-Wall V of the furnace. The channel V is providedwith a valve V operated by a handle V by means of which the heated airmay pass through aside channel V so as to facilitate the cleaning of thesame and drop the ashes into the ash-pit X of the furnace.

The advantages of my improved smoke-eonsuming apparatus are, first, thefuel is supplied to the grate in an automatic manner and distributeduniformly over the grate, so as to be subjected to uniform combustion;second, carbon particles in the smoke are completely burned by thecommingling of the heated air with the products of combustion; third,the ashes and clinkers may be easily removed from the grates, wherebythe fire may be kept in better condition. Moreover, my improvedsmoke-consuming furnace is simple of construction and effective inoperation, being automatic in its action and not requiring skilledlabor.

I claim as new and desire to secure by Letters Patent 1.Asmoke-consuming furnace, comprising an inclined grate provided with anopening, a second grate contacting with the walls forming the opening ofthe first grate inclined in opposite direction to the first and providedwith an opening, sliding gates for said opening, fuel-conveying meanspassing up to said opening, and means actuated by said fuel-conveyingmeans separating the gates from each other for opening the same andmoving the gates toward each other for closing the same, substantiallyas described.

2. A smoke-consuming furnace, comprising an inclined grate, a secondgrate inclined in opposite direction to the first and provided with anopening, gates for said opening, a well below said grates, afuel-receptacle,means in the well for reciprocating the same, a platformin said fuel-receptacle, means for reciprocating the platform, and meansactuated by said fuel-receptacle for opening or closing the gate,substantially as set forth.

3. Asmoke-consuming furnace, comprising an inclined grate, a secondgrate inclined in opposite direction to the first and provided with anopening, gates for said opening, a fuel-receptacle, means for verticallyreciprocating the same, a platform in said fuel-receptacle, means forvertically reciprocating the same, means actuated by the fuel-receptaclefor opening or closing the gates, valves for said receptacle andplatform reciprocating means, and means for actuating the valves at theend of the upper and lower reciprocation of the platform, substantiallyas set forth.

4. A smoke-consuming furnace, comprising an inclined grate, a secondgrate inclined in opposite direction to the first and provided with anopening, gates for said opening, means engaging said gates for openingor closing the same, a fuel-receptacle, a platform in said receptacle,an inclined chute for supplying fuel to said receptacle when in itslowest position, and means for reciprocating the receptacle and theplatform for delivering the fuel in the receptacle to the grates,substantially as set forth.

5. A smoke-consuming furnace, comprising a lower ring, an upper ringprovided with a circumferential gear-wheel and rotatable on said lowerring, an inclined grate supported by said upper ring, a second grateprovided with an opening inclined in opposite direction to said firstgrate and also supported by the upper ring, gates for said opening,means for opening or closing the same, means for supplying the grateswith fuel, and means for rotating the gear-wheel of the upper ring forrotating the grates, substantially as set forth.

In testimony that I claim the foregoing as my invention I have signed myname in presence of two subscribing witnesses.

OTTO EMIL NEUMANN.

Witnesses:

PAUL GoEPEL, (J. P. GoErEL.

